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cricket20 [7]
3 years ago
15

How many ways are there to distribute n graded homeworks to n students such that none of them gets their own homework back?

Mathematics
1 answer:
Yuri [45]3 years ago
8 0
Assume N students

Student 1 can get (n-1) papers
Student 2 can get (n-1) papers
Student 3 can get (n-1) papers
etc
Student N can get (n-1) papers

So for N students you can have N(n-1)
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